package string;
/**
 * String和StringBuilder的性能测试:
 * 1.String是不变对象，因此不适合频繁修改内容，开销大、性能差
 */
public class StringAndStringBuilder {
    public static void main(String[] args) {
        /*
        String str = "a";
        for (int i = 0; i < 1000000; i++) {
            str = str + "a";
        }
        System.out.println("执行完毕");

         */
        StringBuilder builder = new StringBuilder("a");
        for(int i =0;i<1000000;i++){
            builder.append("a");

        }
        System.out.println("执行完毕");

    }
}
